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LEASES - Narrative (Details)
 3 Months Ended
Jan. 01, 2019
USD ($)
item
Mar. 31, 2019
USD ($)
Lessee, Lease, Description [Line Items]    
Right-of-use assets $ 750,000 $ 689,000
Lease liabilities $ 750,000 691,000
Operating leases   72,000
Right-of-use assets obtained in exchange for lease obligations   $ 750,000
Minimum    
Lessee, Lease, Description [Line Items]    
Facility leases | item 1  
Renewal term 1 year  
Maximum    
Lessee, Lease, Description [Line Items]    
Renewal term 5 years  
ASU 2016-02    
Lessee, Lease, Description [Line Items]    
Right-of-use assets $ 700,000  
Lease liabilities 700,000  
Deferred rent 6,000  
Current prepaid expense 6,000  
Cumulative effect adjustment $ 0